基于分组的D2D通信功率控制算法

Packet-Based D2D Communication Power Control Algorithm

为解决现有蜂窝网络中设备对设备(Device to Device,D2D)通信的功率控制算法中路径损耗补偿系数固定导致基站与D2D用户之间产生同频干扰的问题,文章提出了一种基于分组的功率控制算法。所提算法在传统闭环功率控制算法的基础上,利用D2D用户到基站的距离和D2D用户到蜂窝用户的距离,计算出路径损耗补偿系数增补量,并设定3组干扰区域对路径损耗补偿系数的增补量大小进行区分,最后采用联合闭环功率对系统进行干扰抑制。通过仿真实验可得知,该算法比使用传统闭环功率控制算法的系统的信干噪比(Signal to Interference Plus Noise Ratio,SINR)和吞吐量得到了提高,可以显著提高蜂窝网络中D2D通信的功率控制性能,达到干扰抑制的作用。

In order to solve the problem of co-channel interference between the base station and the D2D user caused by the fixed path loss compensation coefficient in the power control algorithm of D2D communication in the existing cellular network,this paper proposes a packet-based power control algorithm.On the basis of the traditional closed-loop power control algorithm,this algorithm uses the distance from D2D users to base stations and the distance from D2D to cellular users to calculate the supplement of the path loss compensation coefficient,and sets three groups of interference regions to distinguish the size of the supplement of the path loss compensation coefficient,and finally uses the joint closed-loop power to perform the interference suppression on the system.Through simulation experiments,it can be seen that this algorithm has improved SINR and throughput compared with the system using the traditional closed-loop power control algorithm,and can significantly improve the performance of power control of D2D communication in cellular networks and achieve the effect of interference suppression.